Re: [PATCH v2 1/2] drm: Add a drm_drv_enabled() to check if drivers should be enabled
From: Jani Nikula <jani.nikula@linux.intel.com>
Date: 2021-11-04 19:57:23
Also in:
amd-gfx, dri-devel, intel-gfx, lkml, nouveau
On Thu, 04 Nov 2021, Javier Martinez Canillas [off-list ref] wrote:
+/**
+ * drm_drv_enabled - Checks if a DRM driver can be enabled
+ * @driver: DRM driver to check
+ *
+ * Checks whether a DRM driver can be enabled or not. This may be the case
+ * if the "nomodeset" kernel command line parameter is used.
+ *
+ * Return: 0 on success or a negative error code on failure.
+ */
+int drm_drv_enabled(const struct drm_driver *driver)
+{
+ if (vgacon_text_force()) {
+ DRM_INFO("%s driver is disabled\n", driver->name);
+ return -ENODEV;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(drm_drv_enabled);
The name implies a bool return, but it's not.
if (drm_drv_enabled(...)) {
/* surprise, it's disabled! */
}
BR,
Jani.
--
Jani Nikula, Intel Open Source Graphics Center
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